From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Failure of the Goshawk 11 battery box fixing and proposed solutions based on deflection tests.
| Identifier | WestWitteringFiles\I\July1922\ Scan77 | |
| Date | 10th July 1922 | |
| R.{Sir Henry Royce} from Hs.{Lord Ernest Hives - Chair} c. to CJ. c. to E.{Mr Elliott - Chief Engineer} c. to Da.{Bernard Day - Chassis Design} c. to BY.{R.W. Bailey - Chief Engineer} ORIGINAL HS{Lord Ernest Hives - Chair} Hsl/LG10.7.22. GOSHAWK 11. BATTERY BOX FIXING. X437Y With reference to your memo. RS{Sir Henry Royce's Secretary}/HS.{Lord Ernest Hives - Chair}7.22 in two cases in which the battery box has failed there was no question of the battery moving about in the box. We had considerable difficulty in getting them out. We have made tests which we consider prove that the failure of the battery box fixing is due to the cantilever fixing at the rear end deflecting. The deflection is due to the side member of the frame twisting. If we hang 56 lbs. on the end of the cantilever bracket the fixing deflects .062" - with 112 lbs., it deflects .125". We believe, from the nature of the breakages at the front end, they have undoubtedly been caused by the back end deflecting and wringing the neck of the front bracket. It would therefore appear that in order to prevent the breakage we ought to introduce more flexibility at the front end rather than make it stiffer as we have done. Hs.{Lord Ernest Hives - Chair} [Handwritten] The HS{Lord Ernest Hives - Chair} Sample Commences approval! | ||